Please buy some bread on your coming. Is this a correct sentence?

or:Please buy some bread on your coming. Is this a correct sentence?or:It is grammatically correct, but we don't talk that way.\"Please buy some brea

or:Please buy some bread on your coming. Is this a correct sentence?


or:It is grammatically correct, but we don't talk that way.\"Please buy some bread when you come.\"

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